Subgrade planer



' Feb. 14, 1928.

. 1,659,504 a. E. WEBB SUBGRADE PLANER Original Filed Jan.6, 1922 2Sheets-$heet V Tic-.1.

Feb. 14, 1928. 1 ,659,504 a. E. WEBB SUBGRADE PLANER Original Filed Jan.6, 1922 2 Sheets-Sheet 3 Patented Feb. 14, 1928.

UNITED stares PATENT GEORGE Evans wEfia oE manage Ass eneit massingcoil:-

, PANY, E MILWAUKEE, WISCONSIN, A conroBA'rIon.

mam E 1 Original application area January 6,1922, Serial No. 527323; hisincaa'ad'a s n 5, 1922. Divided and this applicationfiled February 21,1925. Serial Nb. 10,932.

This application is a division of my 'pend ing application, Serial No.527 ,423, filed January 6, 1922, covering subgrade planer;

The invention embodies a subgrade dirt 5 cutting and leveling machine,having special provisions for cutting work and for causing the dirtacted upon or removed to be leveled by certain scraping or leveling*appliances."

The invention also involvescertain combination means whereby a suhgradeplaner may be readily "employed as an attachment to a "portable roadmachine, as for instance, a concrete paver, and the two operated inconjunction withone another by the smgle power plant of the portablemachine.

An understanding will be had of the detail construction of the planerand its mode of use in connection with a cooperating ma chine forpropelling it, on referenceto the following description, andaccompanying drawings, in which latter the figures may be brieflydescribed as follows Figurel is a. fragmentary view ofthe rear end of aconventional type of a concrete paving machine, showing my subgradefinishing device cooperatively associated there with.

Figure 2 is a top plan View ot the i sjubgrade finishing device, theendless tracks and front axle of a paving machine being shown indiagrammatic manner iorthe purpo e of illustrating the manner ofattaching the device of the invention to the paver,

Figure 3 is an .enlarged transverse sectional view through the finishingdevice or earthplaner.

Figure 4 is a rear view of the finishing device.

Figure 5 is an enlarged detail view of a portion of the forward scraperand the scarifying teeth which are associated there'- with.

Describing my invention specifically, Figure 1 illustrates the subgradeplaner arranged at the rear end of the payer, thelatfter only partlyshown, and the distributing means is of the boom and buckettype, boombeing designated by the number 1 and the bucket by the number 2 Theinultrplanes of the paver are designated 2, a'nd the rear axle 2 Theplaner or finlshingfdevice as a unit is designated B and is adapted tobe propelled by the paver A being shown as having a connection with theaxle 2" and bein located adjacent to the multiplanes 2. In t liSposition the suhgrade finisher is 10- catedbetween the point occupied bythe dis-- tributing bucket 2 at its inner position on the boom, and themultiplanes 2 so that it does not interfere in any manner with the 0niovernentsof the bucket along the boom or prevent the mixed concretebatches from be ing deposited u on the subgrade at any point intheitra'vel o the bucket along the boom.

The frame of this form of subgrade finish er includes spaced andsubstantially parallel transverse beams 21 and 22 which are connected at"intervals in their length by the cross pieces 23. The ends of the frameare each provided with a pair of flanged rollers 7 24 which are adaptedto travel upon the usual road rails or forms O. Horizontally disposedrollers 24 are also shown as arranged at the ends "(it the frame for enage inent with the road rails C to assist in olding the name againstlateral displacement. A transversely extending scraper 25 is seeuie'd tothe cross pieces 23 at a point somewhatto the rear of'the fronttransverse beam 21, and a channel bar 25 is shown as as'sotoen'gagethesurface of the subgrade and is tdrwardlyinclined so that it can acteffectively updn any elevations of the subgrade toplanebrcut the sameaway. Associated with the frontsera er 25 is a series of teeth 26,saidteeth being shown as secured thereto add extending downwardly along thefront thereof. The purpose of these teeth is to assist in breakin up orrooting up the hard spots in thejsuriiaee of the subgrade so that thedevice willoperalte effectively to remove any high places in thesubgrade. The loosened earth inay be deposited in low plates so to fillthe same, or, ifit accumulates'in *sufiicient quantities in front of thesdraper 25 it will press over the top ed 'e of the scraper and drop uponthe subgrade at the rear bit the scraper. The space between the timescraper 25am the front beam 21 is suflicient to permit of this passageof the Tdoseri'ed earth over the top of the front scraper in the mannerindicated.

The rear beam 22 of the frame is provided with a rear scraper 27 whichisrshown as disposed in a substantially vertical position. This scraperprojects downwardly into engagement with the surface of the subgrademulating in front of the rear scraper will be deposited in the .lowplaces so as to fill in the same. If an excessive quantity of looseearth should accumulate in front of the rear scraper, it would pass overthe same, in which event it would have to be manually removed from thesubgrade, although this is a contingency which would not ordinarilyhappen if the preliminary work of grading had been properly done. Undersomeconditions it might be necessary for a workman to shovel some looseearth between the two scrapers in order to provide sufficient materialfor filling in the depressions.

The connection between the subgrade finisher and the paving machine issuch that it is possible to alter the relative position of the twodevices and position the paving machine at either side of the center ofthe road, as may be necessary to obtain the most effective results. Ayoke member 28 is slidably associated with the axle 2 of the tractiondevices 2 of the paver and carries a wheel 29 which is adapted to travelback and forth upon the axle in much the manner of a trolley. The yoke28 is connected by a pair of rearwardly diverging draw bars 30 to theframe of the subgrade finisher. The connection is such that the finisheris pulled along after the paver and propelled thereby, although thepaver can be shifted laterally with respect to the finishing machine andpositioned upon one side of the road or the other side, as may bedesired.

The subgrade is finished and smoothed after the paver has passed overthe same so that it is put in proper condition to receive the concretejust before the concrete is deposited thereon, and this is accomplishedwithout interfering in any manner with the functioning of any part ofthe paver.

As is indicated more clearly by Figure 2, both the frontand rearscrapers may be formed so that they can be adjusted for dif ferentcontours or configurations of the sub grade surface. As indicated, therear scraper 2? is shown as formed in a plurality of sections which areadjustably secured to the rear beam 22 by fastening elements 31. Byproperly adjusting the scraper sections, the scrapers can be positionedat difierent elevations and also set for the desired contour of thesubgrade surface.

Having thus describedmy invent-ion, what 1 claim as new and desire tosecure by Letters Patent, is:

1. A subgra-de finishing device including a frame, traction members atthe ends of the frame adapted to travel on the usual road rails, and apair of transversely extending scraper elements carried by the frame,the forward scraper element being inclined and arranged so that looseearth will pass over the same and be deposited in the space between thetwo scrapers.

2. A subgrade finishing device including a frame formed of transversebeams connected by cross pieces, traction means for supporting the frameon the road rails, and a scraper carried by the cross pieces in a spacedrelation to the beams so that loosened soil can pass over the upper edgeof the scraper.

3. A subgrade finishing device including a frame formed of transversebeams connected by cross pieces, a scraper secured to the cross piecesat a point spaced from and adjacent to the forward beam so that dirt canpass upwardly over the scraper, and a second scraper secured to the rearbeam.

4:. A subgrade finishing device including a frame formed with spacedtransverse beams connected by cross bars, a scraper secured to the crossbars at a point spaced from and adjacent to the front beam, said scraperbeing inclined so that dirt will pass upwardly over the same, scarifyingteeth arranged adjacent to the said scraper in cooperative relationthereto, and a second scraper secured to the rear beam.

5. A subgrade finishing device including a. frame formed of a pair oftransverse beams connected by cross pieces, traction members 7 at theends ofthe frames adapted to travel upon the usual road rails, a frontscraper secured to the cross pieces in a spaced relation to the frontbeam so that dirt can pass upwardly between the scraper and front beamand fallover the upper edge of the scraper, scarifying teeth associatedwith the front scraper, and a rear scraper secured to the rear beam. 7

6. In combination with a traction device which includes an axle, of asubgrade finishing device mounted to travel upon the road rails, atrolley member movable back and forth upon the axle of the paver, anddraft means between the trolley member and the subgrad'e finisherwhereby the latter is connected to the paver in a trailing relation.

c 7. A subgrade finishing device including a frame mounted to travelover the subgrade, and a. pair of spaced scraping elements carried bythe frame and arranged in a position transverse to the direction ofmovement thereof whereby materials accumulating between the scraperswill be deposited in the hollows or depressions of the road bed.

8. A subgrade finishing device including a frame mounted to travel overthe subgrade, a pair of spaced scraping elements carried by the frameand the rear scraping element being arranged in a position transverse tothe direction of movement of the frame, and scarifying teeth associatedwith the forward scraping element whereby elevations will be,

cut away by the forward scraper and the loose material deposited in thehollows by the rear scraper.

9. A subgrade finishing machine including a frame mounted to travel overthe subgrade, a pair of spaced scraping elements carried by the frameand arranged in a position transverse to the direction of movementthereof, the forward scraper being inclined so that loose material willpass over the-same and accumulate in the space between the scrapingelements where it will be deposited in the hollows by the rear scrap ngelements.

10. A subgrade finishing machine including a frame to travel over thesubgrade, a pair of spaced scraping elements carried by the frame andarranged in a position transverse to the direction of movement thereof,the forward scraper being inclined so that loose material will pass overthe same and accumulate in the space between the scraping elements whereit will be deposited in the hollows by the rear scraping elements, andscarifying means associated with the front scraper.

In testimony whereof I afiix my signature.

GEORGE EVANS WEBB.

